I just finished installing the black gem. I took my time. Turned off both the water and electricity and double checked that I did. Except for the puncture wound to my right index finger the whole ordeal was rather uneventful and everything worked right off the bat. I'm content.
I will admit though, I hate working with a "regular" screwdriver (the flat head type.) Why does the "regular" screwdriver even exist? It is worthless in my opinion. Among other potential damage the tool causes, puncture wounds occur for too much when using the regular screwdriver.
Stay tuned for future home maintenance stories. Next time I will report on how installing the white gem went (what else do you call a toilet?)